docs(headers): move blank line in right place.

[batisteo]

http://ironframework.io/doc/iron/headers/struct.ContentType.html#examples

[GitCop]

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• Commit: 65ba136
  • Commits must be in the following format: %{type}(%{scope}): %{description}

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[batisteo]

Changed from:

use hyper::header::{Headers, ContentType};
use hyper::mime::{Mime, TopLevel, SubLevel, Attr, Value};

let mut headers = Headers::new();
headers.set(
    ContentType(Mime(TopLevel::Application, SubLevel::Json,
                     vec![(Attr::Charset, Value::Utf8)]))

);

to:

use hyper::header::{Headers, ContentType};
use hyper::mime::{Mime, TopLevel, SubLevel, Attr, Value};

let mut headers = Headers::new();

headers.set(
    ContentType(Mime(TopLevel::Application, SubLevel::Json,
                     vec![(Attr::Charset, Value::Utf8)]))
);

for consistency with previous block.